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| '''Industrial noise''' is often a term used in relation to environmental health and safety, rather than nuisance, as sustained exposure can cause permanent hearing damage. Traditionally, '''occupational noise''' has been a [[hazard]] linked to heavy industries such as [[ship-building]] and associated only with [[noise-induced hearing loss]] (NIHL). Modern thinking in [[occupational safety and health]] identifies noise as hazardous to [[worker safety and health]] in many places of employment and by a variety of means. | | Their author is known the particular name of Gabrielle Lattimer though she doesn't really like being called in this way. For years she's been working as a [http://Www.Thefreedictionary.com/library+assistant library assistant]. To bake is something that jane is been doing for long periods of time. For years she's been tough to adapt in Massachusetts. She is running and safeguarding a blog here: http://prometeu.net<br><br>Feel free to surf to my blog post ... clash of clans hack tool; [http://prometeu.net similar website], |
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| [[Noise]] can not only cause [[hearing impairment]] (at long-term exposures of over 85 [[decibel]]s (dB), known as an [[exposure action value]]), but it also acts as a causal factor for [[stress (medicine)|stress]] and raises systolic [[blood pressure]]. | |
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| Additionally, it can be a causal factor in [[work accident]]s, both by masking hazards and warning signals, and by impeding concentration.
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| Noise also acts synergistically with other hazards to increase the risk of harm to workers. In particular, noise and dangerous substances (e.g. some [[solvent]]s) that have some tendencies towards [[ototoxicity]] may give rise to rapid [[ear]] damage.
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| [[A-weighting|A-weighted]] measurements are commonly used to determine noise levels that can cause harm to the human ear, and special exposure meters are available that integrate noise over a period of time to give an [[Sound level meter#LAT or Leq: Equivalent continuous sound level|L<sub>eq</sub>]] value (equivalent sound pressure level), defined by standards.
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| ==Reduction==
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| [[Acoustic quieting]] is the process of making machinery quieter by damping vibrations to prevent them from reaching the observer.
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| When two identical industrial noise sources are side by side producing a recorded noise at 100 [[dB(A)]] the reduction in noise from shutting off one of the noise sources is about 3 dB resulting in 97 dB(A).
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| When one doubles the distance from a noise source the recorded noise level is reduced by 6 dB. This is also called the ''Rule of 6''. This is based on the fact that the equation to calculate noise attenuation at a distance <math>d_2</math>, knowing the SPL at distance <math>d_1</math> is given by <math>10log_{10}\left[\left(\frac{d_2}{d_1}\right)^2\right] = 20log_{10}\left[\frac{d_2}{d_1}\right]</math>, where ''d'' is the distance. If the distance is doubled, the equation simplifies to <math>20*log_{10}(2)</math> which equals 6.02 (or approx. 6)
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| ==See also ==
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| *[[Buy Quiet]]
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| *[[Earplug]]
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| *[[Earmuffs]]
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| *[[Noise health effects]]
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| *[[Noise control]]
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| *[[Noise mitigation]]
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| *[[Noise pollution]]
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| *[[Noise regulation]]
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| *[[Protective clothing]]
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| *[[A-weighting]]
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| *[[ITU-R 468 noise weighting]]
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| *[[Weighting filter]]
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| *[[Equal-loudness contour]]
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| *[[Safe-In-Sound Award]] Excellence in Hearing Loss Prevention
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| == External links ==
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| *[http://www.osha.gov Occupational Safety & Health Administration]
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| *[http://www.industrialdeafness.org.uk/ Industrial Deafness]
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| *[http://www.industrialdeafnesswatch.co.uk/ Industrial Deafness Watch UK]
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| *[http://www.industrialdeafness.co.uk/ Industrial Deafness Legislation]
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| {{Employment}}
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| [[Category:Noise]]
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| [[Category:Noise pollution|Industrial noise]]
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| [[Category:Occupational safety and health]]
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| [[Category:Industrial hygiene]]
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